Threshold equalization algorithm for the XAA1.2 ASICs and its application to SuperAGILE X-ray imager
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- 作者：Luigi Pacciani ; Olga Uberti ; Ettore Del Monte ; Andrea Argan ; Marco Feroci ; Paolo Soffitta ; Alessio Trois ; Enrico Costa ; Immacolata Donnarumma ; Yuri Evangelista ; Francesco Lazzarotto ; Massimo Rapisarda
- 关键词：Coded mask ; Silicon microstrip ; Discriminator ; Threshold ; ASIC ; X-ray
- 刊名：Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
- 出版年：2008
- 出版时间：11 August 2008
- 年：2008
- 卷：593
- 期：3
- 页码：367-375
- 全文大小：975 K
文摘
In this paper we report the procedure developed and the results achieved for the equalization of threshold levels for the 6144 discriminator units of XAA1.2 ASICs chosen for the SuperAGILE X-ray imager onboard the AGILE satellite. For these kinds of imager, we will show that the threshold equalization is a critical issue. For each XAA1.2 we reduced the threshold dispersion by a factor of 3–4, and a factor of 2 for daisy chains of ASICs. Despite the method being developed for XAA1.2, the discriminator units and threshold fine-adjustment circuits are common to other chips of XA and VA-TA family, so that the algorithm and results can be extended to these two families of ASICs. This work may be useful for the design of electronic boards where the threshold equalization is a crucial issue.